In 1983, California's Los Rios Community College District developed the Student Flow Research Model, designed to bring together data on community characteristics, student characteristics, student and program performance, and former students' outcomes to answer basic questions related to institutional effectiveness. Over the years, the District has updated the model to include new data base capabilities, renaming it the Collegiate Yearly Accountability (CYA) model. The CYA contains an Enrollment Potential Projection Model (copyright) that determines the potential for increased enrollments and likely effects of different scenarios on enrollment. Another improvement has been the combination of student and course master files, which allows the school to determine who their students are and what courses they are taking. One of the most important developments of the CYA was the Student Performance Data Base, which links students' application, demographic, and grading data in order to produce computerized transcript analyses, course classifications, and other data. Finally, a new Student Follow-up Data Base includes employment information, ratings of college courses, program-specific summaries, and data from skills-specific questionnaires for former students. Through this improved model, the District will be able to move from compliance and accountability to true analyses of institutional effectiveness. Contains 11 references. (YKH)